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authorThomas Voss <thomasvoss@live.com> 2021-10-29 23:02:39 +0200
committerThomas Voss <thomasvoss@live.com> 2021-10-29 23:02:39 +0200
commite7c9108b95e39d7ea5a29ae06d619c4727f11027 (patch)
tree237261eef3afd0720be77dbcbb9599fa66a24b67 /2020/03
Initial commit
Diffstat (limited to '2020/03')
-rw-r--r--2020/03/input323
-rwxr-xr-x2020/03/puzzle-1.awk14
-rwxr-xr-x2020/03/puzzle-2.awk36
3 files changed, 373 insertions, 0 deletions
diff --git a/2020/03/input b/2020/03/input
new file mode 100644
index 0000000..6673c40
--- /dev/null
+++ b/2020/03/input
@@ -0,0 +1,323 @@
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diff --git a/2020/03/puzzle-1.awk b/2020/03/puzzle-1.awk
new file mode 100755
index 0000000..3eac2ba
--- /dev/null
+++ b/2020/03/puzzle-1.awk
@@ -0,0 +1,14 @@
+#!/usr/bin/env -S awk -f
+
+BEGIN { x = 1 }
+{
+ len = split($0, obs, "")
+
+ if (x > len)
+ x -= len
+ if (obs[x] == "#")
+ count++
+
+ x += 3
+}
+END { print count }
diff --git a/2020/03/puzzle-2.awk b/2020/03/puzzle-2.awk
new file mode 100755
index 0000000..88e0625
--- /dev/null
+++ b/2020/03/puzzle-2.awk
@@ -0,0 +1,36 @@
+#!/usr/bin/env -S awk -f
+
+BEGIN {
+ slope[1] = 1
+ slope[2] = 1
+ slope[3] = 1
+ slope[4] = 1
+ slope[5] = 1
+}
+
+{
+ len = split($0, obs, "")
+
+ right = 1
+ for (i = 1; i < 5; i++) {
+ if (slope[i] > len)
+ slope[i] -= len
+
+ if (obs[slope[i]] == "#")
+ count[i]++
+
+ slope[i] += right
+ right += 2
+ }
+
+ # Specific code for slope 5
+ if (NR % 2 == 1) {
+ if (slope[5] > len)
+ slope[5] -= len
+
+ if (obs[slope[5]++] == "#")
+ count[5]++
+ }
+}
+
+END { print count[1] * count[2] * count[3] * count[4] * count[5] }